html,body{
  font-family:'PingFang SC', 'Microsoft Yahei',Arial, Helvetica, sans-serif;
}
body{
  line-height: 1;
}
.clearfix:after {
  content: '';
  height: 0;
  line-height: 0;
  display: block;
  visibility: hidden;
  clear: both;
}

.clearfix {
  zoom: 1;
}

.fl {
  float: left;
}

.fr {
  float: right;
}



